Receiving apparatus.



P. W. MIDGLEY.

RECEIVING APPARATUS. APPLIOATION FILED MAR.5, 1906. RENEWED SEPT 30, 1910.

974,986. Patented Nov. 8, 1910 mvnmm BY @WE..W M g \ATIOBNEY -uurrnn strains runs @FFICE.

FREDERICK W. MIDGLEY, 8F JERSEY CIT'iT, NEW" JE EEsEY, ASSIGNOR TO 'IN'IERN'A- TIONAL TELEGItfiFH-QUNSTRUCTION CQMFANY, is. UOBPGRATION OF NEE-W YORK. L

RECEIVING APPARATUS.

Specification of Letters Eatent.

Patented Nov. cl, 1910.

Application filed March 5, 1906, Serial No. 30%,218. Renewed. September 30, 15 10. Serial E0. hiss- .785.

To all whom if may concern: Be it linown that l, 'Fnnnnnicn d Minc- LEY, a citizen of the United States, residing at Jersey City, in the county of Hudson and State of New Jersey, have invented a new and useful Receiving Apparatus, of which the following is a specification.

My invention relates to the receiving ap paratus employed in signaling systems, and more especially those systems in which the si3. ;nals or messages are represented during transmission by electro-radiant energy.

It is the ohjecljof my invention to render such receiving apparatus more efficient to the end that it shall respond to very weak arriving energy and to the further end that it shall be able to receive and indicate certain energy to the exclusion of other energy which may he existing in the natural media at the same time.

More particularly my invention resides in certain circuit arrangements comprising a condenser, the wave responsive device and another condenser being connected in shunt to said condenser, and all associated with an ordinary open-aerial receiving conductor.

For illustration of several forms my invention may take reference is to be had to the accompanying drawings in which Figure l is a diagrammatic view showing a simple open or non-looped aerial conductor having; associated therewith a condenser in shunt to which are connected a wave re: sponsive device and a condenser, an adjustable inductance being included in the aerial circuit. l1 2 is a diagrammatic view showing the principal condenser connected in shunt to a portion of an inductance included in the aerial circuit. Fig. 3 is a diagrammatic view showing the principal condenser connected in the circuit of a secondary of a tr a nsfornier.

Referring to Fig. 1, A is a simple open aerial conductor, not loopedgvhich may consist of one or more wires or conductors held in an elevated. pc'sition. Between it and the earth plate G, are serially connected the adjustable inductance L and the adjustable condenser K. A second condenser able if desired, and the wzwe-"esponsive dcvice D are connected serially w n each other and .in shunt to the condenser K.

1) here represents a wave-responsive de vice such as the primary cell detector, co1nprising, for example, a zinc cup .2 and By first suitably adjusting the inductance L and the condenser K, and then adjustin condenser C, the aims is renderec highly selective and responsive ,to very weak received signal energy.

in Fig.2, the adj .stable inductance L is connected serially between the aerial conductor A and the earth plate G. An adjustable condenser C may intervene or not, as desired, between the inductance L and the earth plate G. The condenser K is connected in shunt to a variable portion of the inductance L and in shunt to the condenser ii: are connected the condenser C and the wave-detector D. Signal translating instrument T is connected in shunt to the wave detector D. By suitably adjusting the riders on the inductance L, and suitably adjusting the condenser K, and by adjusting the condenser C, if grescnt, highly selective reception of. signals and reception of very Weak signals is possible.

in Fig. 3, P is the prii'nary of a trans former whose number of turns is adjustable by the rider, and between the lower terminal of the primary and the earth plate G may intervene or not, as desired, an adjustable condenser C. S is the secondary of the transformer and connected in shunt to variable portions thereoi is the adjustable condenser ll, the remaining parts being connected as in the previous figures. This disposition of circuits and parts also produces.

sharp selectivity and the ability to receive extremely Weak signals. it is to be understood that in Fig. l, for example, the in-- '20 denser, and a circuit including only said 2. In a wireless signaling system, an open aerial conductor, an inductance and a condenser seriall connected between said aerial conductor an earth, and a non-inductive circuit in shunt to said condenser and including a condenser and a Wave-responsive de vice.

3. In a wireless signaling system, an aerial conductor, a condenser associated therewith, a circuit in shunt to said condenser including only a tuning condenser and a waveresponsive device, and a circuit including only said wave-responsive device and means for translating a signal.

4. In a wireless signaling system, an aerial conductor, an adjustable condenser associated therewith, a non-inductive circuit in shunt to said condenser including a waveresponsive device and a adjustable conwave-responsive device and means for trans-", latin a signal. I I 5. In a wireless signaling system, an aerial conductor, an inductance associated therewith, .an adjustable condenser associated with said inductance, anon-inductive circuit in shunt to said condenser including a waveresponsive device and an adjustable tuning condenser, and a circuit including only said wave-responsive device and means for translatin a signal. I

6. In a wireless signaling system, an open aerial conductor, an adjustable condenser connected between said aerial conductor and earth, a circuit in shunt to said condenser including only a wave-responsive device and an adjustable condenser, and a, circuit including onl saidwave-responsive device and means 0. translating a signal.

"7. In a wireless signaling system, an open aerial conductor, a condenser connected bc-. tween said conductor and earth, a non-inductive circuit in shunt to said condenser in- "cluding a wave-responsive device and a condenser, and a circuit including only said 'nected between said conductor and earth, and a non-inductive circuit inshunt to said condenser includin a wave-responsive device and an adjusta le condenser.

9. In a wireless signaling system, an open aerial conductor, a condenser connected between said conductor and earth, and a noninductive circuit in shunt to said condenser including an electro-chemical cell and a condenser, said cell constituting a waveresponsive device, and signal translating means connected in an untuned circuit. in shunt to said cell. I

10. In a Wireless signaling system, an aerial conductor, a condenser associated therewith, a circuit in shunt to said condenser including a wave-responsive device and a tuning condenser of smaller capacity, and an untuned circuit in shunt to sald wave-responsive device.

11. In a wireless si naling system, an aerial conductor, a sing e path between said conductor and earth, a condenser included in said single path, and a non-inductive circuit in shunt to said condenser including a second condenser and a wave responsive device. I

12. In a wireless signaling system, an aerial conductor, a single path betweensaid conductor and earth, an associated condenser, and a non-inductive circuit in shunt to said condenser including a wave-responsive device and a tuning condenser serially connected.

13. In a wireless signaling system, an aerial conductor, a single path between said conductor and earth, an inductance included in said path, an associated condenser, and a mon-inductive circuit connected in shunt to said condenser and including a tuning condenser and a wave'rresponsive device serially connected. a

In testimony whereof I have hereunto affixed my signature in the presence of the two subscribing witnesses.

FREDK W. MIDGLEY.

' Witnesses: r M. CARROLL,

CHARLES A. Frrzsnrmons. 

